# Trailer Hitch and Tow Package: What Your Vehicle Needs to Tow

> Receiver classes, ball sizes, wiring, tongue weight and what a factory tow package adds. Know your vehicle is ready before you rent. Call (909) 608-7699.

Source: https://goodyearelitetireupland.com/u-haul/hitch-tow-package/  
Last updated: 2026-09-17  
Business: Goodyear Elite Tire Upland, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699

**TL;DR:** A **trailer hitch** lets you connect a trailer. A **tow package** usually adds wiring and cooling for heavier towing. We check your setup and **tow vehicle tires and brakes** before you leave.

A trailer hitch is the receiver bolted to your vehicle that a ball mount slides into. A tow package is a factory or added set of towing parts, often including the hitch, trailer wiring and extra cooling. Before renting a U-Haul trailer, confirm your vehicle has a rated hitch, working wiring and enough towing capacity. We check it all at pickup.

## What is the difference between a hitch and a tow package?

A hitch is one part. A tow package is a group of parts. Many people use the words interchangeably, and that causes confusion when renting a trailer.

### A trailer hitch

The receiver hitch is a square tube bolted to the frame under your rear bumper. A ball mount slides in, a pin locks it, and the trailer couples to the ball. Some vehicles have a hitch but no wiring.

### A tow package

A factory tow package typically bundles the hitch with trailer wiring and often extra cooling for the engine or transmission. Some packages include other towing-related parts. What is included depends on the maker and model, so check your window sticker or owner's manual.

### Why it matters for a rental

A hitch alone may be enough for a small cargo trailer. A heavy auto transport or a large trailer typically needs a vehicle properly equipped for towing. We check your vehicle when you call (909) 608-7699.

## What do hitch receiver classes mean?

Receiver hitches are grouped into classes by how much they are built to handle. The class and ratings are printed on a label on the hitch. The general pattern looks like this:

| Class | Typical receiver opening | Typical use |
|---|---|---|
| Class I | 1-1/4 inch | Light loads, bike racks, small trailers |
| Class II | 1-1/4 inch | Light to moderate trailers |
| Class III | 2 inch | Common on SUVs and pickups for moderate towing |
| Class IV | 2 inch | Heavier towing |
| Class V | 2 inch or larger | Heavy-duty towing |

These are general groupings. Always read the actual label on your hitch for its maximum trailer weight and tongue weight. Your vehicle's own towing capacity may be lower than the hitch rating, and the lower number wins.

## How do you find out how much your vehicle can tow?

Start with the owner's manual. It lists towing capacity, often with conditions such as engine, axle ratio or package. Then check the labels on your vehicle and hitch.

1. **Owner's manual:** maximum towing capacity and any tow package requirements.
2. **Door jamb labels:** weight ratings and tire information for your vehicle.
3. **Hitch label:** maximum trailer weight and tongue weight for the receiver.
4. **Ball mount and ball:** their own stamped ratings.

Your safe limit is the lowest of these numbers. When you call to reserve, give us your year, make and model, and we check it against U-Haul's requirements for the trailer you want. The [towing equipment](https://goodyearelitetireupland.com/u-haul/towing-equipment/) page explains each part in more detail.

## How do you pick the right ball mount and ball?

The ball mount sets the height of the ball, and the ball must match the trailer coupler. Get either wrong and the trailer tows poorly or unsafely.

### Ball mount drop or rise

The goal is a trailer that sits roughly level when coupled. If your vehicle sits high, like many pickups, you need a mount with a drop. If it sits low, you may need less drop or a rise. A trailer that tilts nose-down or nose-up can handle badly.

### Ball size

Common sizes are 1-7/8 inch, 2 inch and 2-5/16 inch. The size is stamped on top of the ball, and the coupler lists the size it needs. They must match exactly.

### Ball tightness

The ball nut must be tight. A ball that spins or wobbles on the mount needs attention before towing. At pickup, we check all three.

## Does your vehicle have the right trailer wiring?

Your trailer's running lights, turn signals and brake lights all depend on your vehicle's wiring. Many vehicles with a hitch have a connector near it, often a 4-pin flat plug or a round 7-pin plug. Some have a hitch and no wiring at all.

Common wiring problems we see:

- Corroded pins from years without use
- A loose or broken ground wire
- A blown fuse for the trailer circuit
- Damaged wires near the bumper

We test every light function with the trailer connected. If something fails in your vehicle wiring, we explain it and write an estimate before any repair. Our [hitch and tow package inspection](https://goodyearelitetireupland.com/services/hitch-tow-package-inspection/) service covers deeper wiring diagnosis.

## How does tongue weight affect your hitch?

Tongue weight is the downward push of the trailer on your hitch ball. Your hitch has a maximum tongue weight rating on its label, and general towing guidance puts good tongue weight at roughly 10 to 15 percent of the loaded trailer weight.

- **Too light:** the trailer can sway, especially at speed.
- **Too heavy:** the rear of your vehicle squats, the front lifts, and steering and braking feel light.
- **Over the hitch rating:** stresses the receiver and frame.

Load heavy items low and just ahead of the trailer axle, balance side to side, and look at your vehicle from the side once hooked up. The [free towing inspection](https://goodyearelitetireupland.com/u-haul/towing-inspection/) page explains how we check stance at pickup.

## Are your tires and brakes ready to tow?

Towing puts extra load on your rear tires and makes your brakes work much harder, especially on long downhill grades. A setup with a perfect hitch can still be unsafe on worn tires or thin pads.

What we look at in the same visit:

- **Tire tread and wear pattern:** uneven wear can signal alignment or suspension issues.
- **Tire age:** old rubber can fail under load even with good tread.
- **Tire pressure and load capacity:** many vehicles list a higher pressure for loaded conditions on the door placard.
- **Brake pads:** thickness and signs of overheating.
- **Obvious leaks:** brake fluid, transmission fluid or coolant.

You get a written estimate split into need and want. Read our [brake service](https://goodyearelitetireupland.com/services/brake-service/) page for how brake inspections work, and the [tire date code guide](https://goodyearelitetireupland.com/tires/tire-date-code-guide/) to check tire age yourself.

Also check your tow vehicle for open recalls at [NHTSA](https://www.nhtsa.gov/recalls) before a long pull.

## What if your vehicle has no hitch yet?

Sort that out before you reserve a trailer. A trailer reservation without a working hitch on your vehicle leads to a wasted trip on pickup day. Call (909) 608-7699 and describe your vehicle. We tell you plainly what it needs and what we can help with, and whether another option, like a moving truck, makes more sense for your move.

If your vehicle already has a hitch that has not been used in years, bring it in before moving day. Rust, a seized ball or dead wiring is much easier to handle during the week than on the morning of your move.

## What do towing weight terms like GVWR and GCWR mean?

Towing ratings come with a lot of letters. Knowing the main terms helps you read your manual and door labels with confidence.

| Term | What it means |
|---|---|
| Towing capacity | The most trailer weight the maker says your vehicle can pull |
| GVWR | Gross vehicle weight rating: the most your vehicle can weigh, loaded |
| GCWR | Gross combined weight rating: vehicle plus trailer, fully loaded |
| Payload | What your vehicle can carry inside, including people and tongue weight |
| Tongue weight | The downward push of the trailer on the ball |
| GAWR | Gross axle weight rating: the most each axle can carry |

Tongue weight counts against payload. A pickup full of people and boxes can hit its payload limit before it hits its towing capacity. Add up the passengers, cargo and tongue weight, and compare that total to the payload figure on the door jamb label.

## Why do cooling and the transmission matter when you tow?

Towing makes the engine and transmission work harder for longer, and heat is what wears them out. That is why many factory tow packages add extra cooling. Grades such as the I-15 through Cajon Pass make the load even heavier.

Signs your vehicle is struggling:

- The temperature gauge climbs above its usual spot
- The transmission shifts back and forth on hills
- A burning smell after a long climb
- Coolant or transmission fluid spots under the vehicle

How to help it:

1. Use tow or haul mode if your vehicle has one.
2. Let speed fall on climbs instead of forcing it.
3. Turn off the air conditioning if the engine runs hot.
4. Have old coolant and transmission fluid looked at before a big tow.

Our [cooling system service](https://goodyearelitetireupland.com/services/cooling-system-radiator/) page explains what we check, and our transmission service covers fluid condition after heavy towing.

## Needed now versus can wait

### Needed now
- Ball size that does not match the trailer coupler
- Missing or damaged hitch pin or clip
- Trailer brake or turn signals not working
- Receiver with cracks or heavy rust at the mounting points
- Tires with exposed cords, bulges or very low tread before a loaded tow

### Can wait
- A ball mount with a better drop so the trailer sits level
- Cleaning light corrosion from the wiring plug
- Replacing tires that are wearing but still safe
- Adding towing mirror extensions for better visibility

## Our process

1. **Check your manual:** Find your towing capacity and any tow package requirements.
2. **Call with details:** Call (909) 608-7699 with your vehicle and the trailer you want.
3. **Bring it in early:** If the hitch or wiring is unused or doubtful, have it checked before moving day.
4. **Hitch check at pickup:** We check receiver, pin, ball mount, ball size and coupler latch.
5. **Light test:** We test running, turn and brake lights with the trailer connected.
6. **Tires and brakes:** On request, we check your tow vehicle and give you need versus want.

## What's included

- Tow vehicle match check before you reserve
- Receiver and hitch label review
- Ball size and ball mount height check
- Pin, clip and coupler latch check
- Trailer wiring and light test
- Tongue weight explanation
- Optional tire and brake inspection
- Written estimate before any repair

## Frequently asked questions

### Do you inspect hitches before I tow?

Yes. Every U-Haul trailer and tow dolly rental gets a free hitch check at pickup. We check the receiver, pin and clip, ball mount, ball size, coupler latch, safety chains and trailer lights.

### Is a hitch the same as a tow package?

No. A hitch is the receiver on your vehicle. A tow package usually bundles the hitch with wiring and often extra cooling. What is included varies by vehicle, so check your window sticker or owner’s manual.

### What hitch class do I need to rent a trailer?

It depends on the trailer and your vehicle. Small cargo and utility trailers need less than an auto transport. Call (909) 608-7699 with your vehicle and the trailer you want, and we check the requirements.

### Can you fix my trailer lights?

We test the lights at pickup and diagnose what fails. If the fault is in your vehicle wiring, we explain it and give you a written estimate before any repair.

### My vehicle has no hitch. Can I still rent a trailer?

Not until the vehicle is set up to tow. Call us and describe your vehicle. We tell you plainly what it needs, or suggest a moving truck if that fits your move better.

### Towing a trailer with tired rear tires, is that a problem?

Yes. Towing adds load to your rear tires, and worn or old tires are more likely to fail. We can check tread, age and pressure in the same visit and tell you what is a need and what can wait.

### What is the difference between towing capacity and payload?

Towing capacity is how much trailer your vehicle can pull. Payload is how much it can carry, including passengers, cargo and tongue weight. A loaded vehicle can reach its payload limit before it reaches its towing capacity.

### Does my vehicle need extra cooling to tow a trailer?

It depends on the vehicle and the load. Many factory tow packages add cooling for heavier towing. Watch the temperature gauge on grades, and have coolant and transmission fluid checked before a long or heavy tow.

## Related pages

- https://goodyearelitetireupland.com/u-haul/towing-inspection/
- https://goodyearelitetireupland.com/u-haul/towing-equipment/
- https://goodyearelitetireupland.com/services/hitch-tow-package-inspection/
- https://goodyearelitetireupland.com/services/brake-service/
- https://goodyearelitetireupland.com/contact/phone-email/

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Call (909) 608-7699 or book at https://goodyearelitetireupland.com/contact/book-appointment/